Create Your Own Tube Ad

We're normally reluctant to cover viral campaigns, but this is an irresistible idea from advertising monolith CBS: a visualisation tool to make fake adverts on the London underground. Not so genius is the way the output video can't be embedded at different sizes and plays automatically, so we've given you a screengrab of our first foray into advertising (video here). Thanks to Annie Mole for the tip-off.